finally ive sorted it!
the mixer valve was on full(or seemed like it was)i unscrewed it until it came off spewing water out(while the heater was on)screwed it back on and NOW im finally getting HOT WATER!
coiled up temperature 61c.................with 60m of hose out 48c!
i washed the van and the golf this afternoon and with 8 metres off the reel the temperature was 58c!!
do you think the mixer valve could of had an air lock lads?its done the trick anyway!
well happy now!!